The Cupeno spoke a dialect belonging to the Luiseno-Cahuilla branch of the Shoshonean division of the Uto-Aztecan linguistic stock.
Cupeño Indians. From Kupa, the name of one of their towns.
Location. A mountainous district on the headwaters of San Luis Rey River, not over 10 by 5 miles in extent.
Villages: Kupa, near the famous hot springs of Warner’s Ranch. Wilakal, at San Ysidro.